A nurse is caring for a client who is receiving oxygen at 2 L/min via a nasal cannula. The nurse recognizes the client is receiving which of the following inspired oxygen concentration?

A) The client tolerates a second dose of medication with no greater than 1 peripheral edema:
This does not directly indicate a therapeutic response to epinephrine for angioedema. Angioedema primarily involves swelling of deeper layers of the skin, often around the eyes and lips, and sometimes the throat, which can cause breathing difficulties. Tolerating a second dose of medication with minimal peripheral edema does not specifically address the acute respiratory effects of angioedema.

B) Respirations are unlabored:
This is the correct answer. Angioedema can cause swelling in the airways, leading to difficulty breathing. Epinephrine is used to reduce this swelling and improve airway patency. Unlabored respirations indicate that the airway is not obstructed, which means the epinephrine has successfully alleviated the swelling causing the angioedema.

C) Client reports decreased groin pain of 3 on a 1 to 10 scale:
Decreased groin pain is not relevant to the treatment of angioedema with epinephrine. Pain relief in the groin area does not indicate a therapeutic response to epinephrine, which is primarily used to address airway and anaphylactic symptoms.

D) The client's blood pressure when arising from resting position is at premedication levels:
While epinephrine can affect blood pressure, the main concern with angioedema is airway obstruction rather than blood pressure control. Normalizing blood pressure does not specifically indicate that the epinephrine has successfully treated the angioedema and improved the client's respiratory status.

A) Lactated Ringer's:
Lactated Ringer's solution is an isotonic crystalloid solution that contains electrolytes similar to those found in plasma. It is commonly used for fluid resuscitation and maintenance therapy but is not typically used for treating hypernatremia, as it contains sodium chloride and could exacerbate the client's condition.

B) Dextrose 10% in water:
Dextrose 10% in water is a hypertonic solution primarily used to provide calories and treat hypoglycemia. It does not address the underlying electrolyte imbalance in hypernatremia.

C) 0.45% sodium chloride:
0.45% sodium chloride, also known as half-normal saline, is a hypotonic solution used to treat hypernatremia by diluting the excess sodium in the bloodstream. It provides free water to rehydrate cells without adding excessive sodium. This solution is appropriate for clients with hypernatremia who require IV fluid therapy.

D) Dextrose 5% in 0.9% sodium chloride:
Dextrose 5% in 0.9% sodium chloride, also known as D5NS, is a hypertonic solution containing both dextrose and sodium chloride. While it provides water and calories, the sodium content may exacerbate hypernatremia rather than correct it. Therefore, it is not the most appropriate choice for a client with hypernatremia.